Manejo do solo e do nitrogênio em milho cultivado em espaçamentos reduzido e tradicional

Kaneko, Fuminari; Arf, Orivaldo; Gitti, Douglas de Castilho; Arf, Marcelo Valentini; Chioderoli, Carlos Alessandro; Kappes, Claudinei

doi:10.1590/s0006-87052010000300020

Cited by 13 publications

(17 citation statements)

References 10 publications

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“…These authors observed that the spacing 0.45 m yielded 6.67 t ha -1 of grains, while 0.90 m yielded 5.81 t ha -1 , occurring more equidistant plant distribution in the area with the hybrids 30K75 and Tork in the spacing 0.45 m. Similarly, Argenta (2001) and Kaneko et al (2010) obtained increased yield by reducing the row spacing from 0.90 to 0.45 m.…”

Section: Resultsmentioning

confidence: 92%

“…These yields are still far below those in the United States, with average corn yield of 9240 kg ha -1 (USDA, 2012). Brazilian low yields are closely related to climatic conditions (Cruz et al, 2008;Martin et al, 2011), plant density and plant arrangement (Alvarez et al, 2006;Kaneko et al, 2010;Chioderoli et al, 2012), as well as soil fertility. The average amount of nitrogen (N) used in corn crops in Brazil is 60 kg ha -1 , while in the United States is 150 kg ha -1 (Coelho, 2007), however, N is the most limiting nutrient for the growth and development of plants and represents one of the highest input costs in farming systems (Souza et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The increase in corn yield with reduced spacing identified by Kaneko et al (2010) and Modolo et al (2010) facilitates the no-tillage system in crop succession with soybean and corn while maintaining the same spacing for both cultures, without the need to rearrange the seed distribution in seeders.…”

Section: Introductionmentioning

confidence: 99%

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Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

et al. 2014

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RESUMOEspaçamento, densidade populacional e adubação nitrogenada na cultura do milho O objetivo deste trabalho foi avaliar os componentes de produção, teor de nitrogênio (N) no tecido foliar e produtividade de grãos na cultura do milho em função de diferentes espaçamentos entre linhas, densidade populacional e doses de adubação nitrogenada em cobertura. O experimento foi conduzido no município de Toledo-PR, no ano agrícola de 2005/2006, em área de Latossolo Vermelho Eutroférrico sob sistema de semeadura direta, com o híbrido simples AG 8021. O delineamento experimental utilizado foi em blocos casualizados, com quatro repetições e tratamentos dispostos em parcelas subsubdivididas. Nas parcelas foram alocados os espaçamentos entre linhas (0,45 e 0,90 m), nas subparcelas foram alocadas as populações de plantas de milho (60 mil e 80 mil plantas ha -1 ) e nas subsubparcelas foram alocadas as doses de nitrogênio em cobertura (80, 100, 120 e 140 kg ha -1 de N), utilizando-se como fonte de nitrogênio a ureia. A elevação da população de plantas de 60 mil para 80 mil plantas ha -1 , assim como a aplicação de doses crescentes da adubação nitrogenada em cobertura proporcionaram incremento nos componentes de produção. A aplicação de N em cobertura proporciona incremento no teor de N foliar e na produtividade de grãos para o espaçamento 0,45 m e 0,90 m. O espaçamento de 0,45 m alcançou produtividade superior ao espaçamento 0,90 m. Com 60 mil plantas a produtividade foi maior do que com 80 mil plantas no espaçamento de 0,90 m, enquanto que com 0,45 m não houve diferença quanto à densidade populacional.Palavras-chave: arranjo de plantas, Zea mays L., ureia, nitrogênio em cobertura. Spacing, population density and nitrogen fertilization in corn grown in an OxisoilThe objective of this study was to evaluate yield components, leaf nitrogen content and grain yield in corn as affected by row spacing, plant density and nitrogen topdressing. The experiment was conducted with the singlecross hybrid AG 8021, in the municipality of Toledo-PR, in an Oxisoil under no-tillage system, in the crop year 2005/ 2006. The experiment was arranged in a randomized block design and treatments in split-split-plots, with four replications. The two row spacings (0.45 and 0.90 m) were allocated in the main plots, the two plant densities (60,000 and 80,000 plants ha -1 ) were allocated in the subplots and the three nitrogen rates (80, 100, 120 and 140 kg ha -1 N) were allocated in the sub-subplots. Topdress nitrogen was applied using urea as N source. The rise of the plant population from 60,000 to 80,000 plants ha -1 and the application of topdress nitrogen resulted in increased production components. The application of topdress fertilization provided increase in leaf N content and grain yield for the spacings 0.45 m and 0.90 m. Yield was higher in the spacing 0.45 m than 0.90 m. Yield was higher with 60,000 plants than with 80,000 plants at 0.90 m, while at 0.45 m there was no difference in relation to the plant density.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

et al. 2014

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“…In the same sense, KANEKO et al (2010), working with three different soil tillage (disk harrow + leveling harrow, chisel plow + disc harrows and no-tillage), five epochs of N application and two spacing (0.45 and 0.90 m), found that soil management in no-tillage system promoted higher plant population. The same results were found by ARF et al (2007), who in two seasons of cultivation, no-tillage system provided higher plant population, working with the spacing of 0.90 m. According to the authors the most friction between the seeder in no-tillage and the driving wheel , enabled the better functioning of the system, thus increasing the number of seeds per meter, and consequently the plant population.…”

Section: Resultsmentioning

confidence: 86%

Corn productivity in function of surface application of lime in differents management systems and cultural preparation

Narimatsu¹,

Mello

Domingues

et al. 2014

Eng. Agríc.

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ABSTRACT:The evaluation of technologies employed at the agricultural production system such as crop rotation and soil preparation, both associated with crop-livestock integration, is crucial. Therefore, the aim of the present study was to evaluate the incorporation of lime for three no-tillage systems and cultural managements in system of crop-livestock integration, with emphasis on corn grain yield. The experiment was conducted from January 2003 to April 2005 at Selvíria city, MS, in Dystroferric Red Latosol, clay texture. The experimental design was randomized blocks with split plots consisted of three main treatments, aimed the soil physics conditioning and the incorporation of lime: PD -No-no-tillage; CM -minimum no-tillage, and PC -conventional no-tillage; and of two secondary treatments related to the management: rotation and crop succession, with four replications. Data on agronomic traits of maize were analyzed: plant height, stem diameter, height of the first spike insertion, 100 grains weight and grain yield. The results showed that the maize produced under the system of croplivestock integration is quite feasible, showing that grain yields are comparable to averages in the region and the different soil physical conditioning and incorporation of lime did not influence the corn yield as well as the cultural managements, rotation and succession, did not affect the maize crop behavior after two years of cultivation.

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“…Strieder et al (2008), por outro lado, notaram que a produtividade não foi afetada pelos sistemas de manejo. Não obstante, diversos outros autores obtiveram resultados semelhantes aos obtidos nesta pesquisa (FORSTHOFER et al, 2006;KANEKO et al, 2010;SANGOI et al, 2003). Silva et al (2007) notaram que o sistema orgânico não apenas apresentou produtividade superior ao sistema sem adubação, mas também ao sistema convencional, concordando, em parte, com os resultados desta pesquisa, onde o emprego do médio nível tecnológico, de manejo orgânico, aumentou em 28,78% a produtividade em relação ao emprego do baixo nível tecnológico, porém, o emprego do alto nível tecnológico, incrementou a produtividade em 25,32% em Desempenho agronômico de variedades crioulas e híbridos de milho cultivados em diferentes sistemas de manejo relação ao médio nível.…”

Section: Resultsunclassified

Desempenho agronômico de variedades crioulas e híbridos de milho cultivados em diferentes sistemas de manejo

Araújo¹,

Brandão²,

Ferreira³

et al. 2013

Rev. Ciênc. Agron.

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RESUMO -Apesar das variedades crioulas favorecerem a autonomia no processo produtivo na agricultura familiar, tem-se observado o seu abandono ao elevar-se o nível tecnológico empregado na lavoura, acreditando-se que apenas os cultivares modernos apresentam retorno econômico. Dessa forma, o objetivo deste trabalho foi verificar a influência de diferentes sistemas tecnológicos de manejo sobre os caracteres agronômicos de milho, provenientes de duas variedades crioulas ('Argentino' e 'BR da Várzea') e de dois híbridos. Os sistemas de manejo foram classificados como baixo, médio e alto nível tecnológico. O experimento foi conduzido em esquema fatorial 4x3 (quatro genótipos de milho e três sistemas tecnológicos de manejo), em delineamento em blocos completos casualizados, em faixas, com três repetições. Avaliaram-se a emergência, a incidência de Spodoptera frugiperda (lagarta-do-cartucho), a precocidade e a sincronia do florescimento, plantas acamadas, o diâmetro do colmo, a altura da planta e da inserção da espiga, o estande final e a produtividade. O desempenho agronômico das variedades crioulas foi maximizado pelo incremento tecnológico, tanto quanto os híbridos. Práticas de manejo acessíveis, como a utilização de adubação orgânica e o controle alternativo de pragas, são capazes de maximizar a produção de grãos de milho. ABSTRACT -Despite landrace varieties favouring autonomy in the production process in family farming, their use has been neglected with the rise in the level of technology employed in agriculture, where it is believed that only modern cultivars present an economic return. The objective of this study therefore was to investigate the influence of different technological management systems on the agronomical characteristics of maize from two landrace varieties ('Argentine' and 'BR da Várzea') and from two hybrids. The management systems were classified as being of a low, medium and high technological level. The experiment was carried out in a 4x3 factorial (four maize genotypes and three technological management systems) in a complete randomized block design, in strips and with three replications. The following were evaluated: emergence, incidence of Spodoptera frugiperda (armyworm), flowering precocity and synchrony, plant bedding, stem diameter, plant and ear height, final growth and productivity. The agronomical performance of both the landrace varieties and the hybrids were maximized by technological advances. Affordable management practices, such as the use of organic fertilizers and alternative pest-control, are able to maximize the production of maize. Palavras

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Manejo do solo e do nitrogênio em milho cultivado em espaçamentos reduzido e tradicional

Cited by 13 publications

References 10 publications

Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

Corn productivity in function of surface application of lime in differents management systems and cultural preparation

Desempenho agronômico de variedades crioulas e híbridos de milho cultivados em diferentes sistemas de manejo

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